US9046084B2 - Swashplate-type pivot bearing and axial piston machine - Google Patents
Swashplate-type pivot bearing and axial piston machine Download PDFInfo
- Publication number
- US9046084B2 US9046084B2 US12/720,841 US72084110A US9046084B2 US 9046084 B2 US9046084 B2 US 9046084B2 US 72084110 A US72084110 A US 72084110A US 9046084 B2 US9046084 B2 US 9046084B2
- Authority
- US
- United States
- Prior art keywords
- swashplate
- follow
- section
- guide
- pivot bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
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Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2078—Swash plates
- F04B1/2085—Bearings for swash plates or driving axles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/26—Control
- F04B1/28—Control of machines or pumps with stationary cylinders
- F04B1/29—Control of machines or pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B1/295—Control of machines or pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/50—Other types of ball or roller bearings
- F16C19/502—Other types of ball or roller bearings with rolling elements in rows not forming a full circle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/306—Means to synchronise movements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
Definitions
- the invention relates to a swashplate-type pivot bearing having a housing section, having a swashplate section and having a multiplicity of rolling bodies, with the swashplate section being pivotably mounted in the housing section by means of the rolling bodies, with the rolling bodies being arranged in a full-roller configuration and/or without a cage in at least one row, and having at least one follow-up device which, for providing a follow-up adjustment and/or synchronization of the rolling bodies, is arranged and/or formed at an end of the rolling body row.
- the invention also relates to an axial piston machine having the swashplate-type pivot bearing.
- Swashplate-type pivot bearings are used for example in hydraulic axial piston machines, with a partially cylindrical plate section being pivotably mounted in a partially hollow cylindrical housing region.
- the pivotable mounting takes place by means of rolling bodies which, as a whole, form a rolling body segment.
- bearing shoes are arranged on the plate section, which bearing shoes, during the pivoting movement of the plate section, move pistons of the axial piston machine.
- the rolling bodies extend only over a circular segment and are moved back and forth during the pivoting movement.
- a swashplate-type pivot bearing which is of full-roller configuration or has no cage, with the toothings in the plate or housing section extending over the entire length of the row of rolling bodies and with each rolling body having an encircling toothing, such that each rolling body is synchronized independently of its neighbors.
- the object on which the invention is based is that of proposing a swashplate-type pivot bearing, and an axial piston machine having the swashplate-type pivot bearing, which ensure reliable operation.
- the swashplate-type pivot bearing according to the invention is preferably suitable and/or designed for an axial hydraulic pump, in particular in an adjusting mechanism for changing the feed volume of the pump. Specifically, the change in feed volume takes place by means of an adjustment of an angle of inclination of the swashplate.
- the swashplate-type pivot bearing has a housing section, a swashplate section and a multiplicity of rolling bodies which are arranged such that the swashplate section is pivotably mounted in the housing section.
- the housing section and swashplate section may serve to provide raceways for the rolling bodies in an integrated fashion; in modified embodiments, the raceways are arranged in bearing shells which are placed onto and/or inserted into the housing section and the swashplate section.
- the rolling bodies are arranged in a full-roller configuration with respect to one another, in particular in direct contact without intermediate and/or guide elements, and/or are positioned without a cage. Even though such full-roller bearings are less suitable for use at high rotational speeds, they have a higher load capacity, which is advantageous in the present embodiment.
- a follow-up device is arranged at least one end of the rolling body row, which follow-up device ensures that the rolling bodies always remain in a favourable position for the pivoting movement.
- the follow-up device is displaced relative to the housing section and simultaneously relative to the swashplate section and/or is guided concurrently with the rolling bodies.
- a follow-up device of said type is preferably arranged at each end of the rolling body row.
- control in particular of the relative movement with respect to the housing section and/or with respect to the swashplate section, is realized by means of a slotted guide, with the slotted guide preferably providing positive guidance for the follow-up device.
- the follow-up device comprises an end stop for the rolling body at the end of the rolling body row.
- the end stop is moved by the slotted guide concomitantly with the rolling bodies during a pivoting movement of the swashplate-type pivot bearing.
- the synchronization and/or follow-up adjustment of the rolling bodies therefore takes place in a sliding fashion by means of the rolling bodies being acted on with force in the rolling direction thereof.
- the slotted guide has a first and a second guide slot, the guide slots being fixedly connected to the housing section and swashplate section, respectively.
- the guide slots of the slotted guide are moved concomitantly with the follow-up device.
- Said alternative constitutes a kinematic reversal of the alternative specified above.
- the first and second guide slots intersect at least in one plane of projection, with the intersection point forming a guide point for the follow-up device.
- the intersection point or the guide point travels along the first and second guide slots, such that the follow-up device is positively guided by the two guide slots together. Since the guide slots intersect at the guide point, positive guidance is obtained without a degree of freedom.
- the follow-up device has a guide member which engages into both guide slots.
- the guide member therefore forms the sliding block(s) for the slotted guide.
- the guide member engages at one side into both guide slots, at two sides in each case into both guide slots, or at two sides in each case into one guide slot.
- the guide member is designed as a bolt whose free ends engage as sliding block into the first and second guide slots.
- the guide slots are arranged on or in one or more planes which is or are perpendicular to the rotational axes of the rolling bodies and/or in the same direction as the longitudinal extent of the rolling body row.
- the guide slots extend on one or more surfaces, which are arranged parallel to and/or which are formed by the raceways of the rolling bodies. If said surfaces or used, it is possible to realize a synchronization of the swashplate-type pivot bearing without increasing the installation space in terms of bearing height and/or in the width direction. This advantage is particularly pronounced in the case of arrangements in which installation space is limited.
- the guide slots are arranged or formed on or in the raceways for the rolling bodies and/or an extension of the raceways for the rolling bodies.
- the extensions may be designed as extensions of constant curvature, but may alternatively be designed as any desired type of extensions, for example planar sections or sections curved in some other way.
- the guide slots are formed as slots in the raceways. Such slots may be formed in a simple and cost-effective manner.
- the first guide slot is arranged, in particular inserted, on or in the raceway or its extension of the housing section, with the longitudinal extent of the first guide slot being inclined with respect to the longitudinal extent of the raceway of the housing section by a first angle, preferably in the plane or curved plane of the raceway.
- a first definition the first angle is determined in cylindrical coordinates on the cylindrical running surface, while by a second possible definition, the first angle is measured in a projection in a plan view of the running surface.
- the second guide slot which is arranged, in particular inserted, in the raceway or its extension of the swashplate section, to be inclined with respect to the longitudinal extent of the raceway of the swashplate section by a second angle. It is also possible for the second angle to be defined both in cylindrical coordinates and also in a projection view.
- first and second angles are equal in magnitude and/or to differ by less than 15°, preferably less than 10° and in particular less than 5°.
- the deviation of the angle permits fine adjustment of the positive guidance, as a result of which influences of the different radii of the raceways can be compensated.
- the angles are arranged, in a projection, symmetrically with respect to a line perpendicular to the longitudinal extent of the raceway, which lies in the raceway surface.
- a final subject matter of the invention relates to an axial piston machine with variable throughput volume, which axial piston machine is characterized by the swashplate-type pivot bearing as described above, or according to one of the preceding claims.
- the swashplate-type pivot bearing is preferably designed as a pivoting-base bearing.
- FIG. 1 shows a schematic, partially sectional illustration of an axial hydraulic pump with a swashplate-type pivot bearing as a first exemplary embodiment of the invention
- FIG. 2 shows a detail of the swashplate-type pivot bearing in FIG. 1 in a similar illustration
- FIG. 3 shows the detail of FIG. 2 in a schematic plan view.
- FIG. 1 shows an axial piston machine having a cylinder drum 1 which is arranged on a shaft 2 , with the shaft 2 being a pump or motor drive input shaft or drive output shaft depending on the use of the machine.
- the shaft 2 is mounted by means of bearings 5 and 6 in a housing composed of the housing section 3 and housing part 4 .
- pistons 8 are arranged within cylinder bores 7 , which pistons 8 are supported via sliding shoes 9 on a swashplate 10 .
- the swashplate 10 has a cylindrical bearing surface 11 which is situated opposite a hollow cylindrical bearing surface 12 in the housing section 3 . Said two surfaces are spaced apart from one another by a bearing gap 22 .
- the stroke of the pistons 8 in the cylinder bores 7 is set in a known way by varying the angular position of the swashplate 10 with respect to the axis 13 of the shaft 2 .
- an adjusting device (not illustrated) engages, for example, on a lever 14 which is fixedly connected to the swashplate 10 .
- a rolling bearing segment 15 Arranged in the bearing gap 22 between the bearing surfaces 11 and 12 is a rolling bearing segment 15 .
- a further rolling bearing segment 15 (not visible), such that the swashplate 10 is supported twice.
- the rolling bearing segment 15 comprises a multiplicity of cylindrical rollers 16 which are arranged in a full-roller configuration and/or without a cage and/or in direct contact with one another in the bearing gap 22 .
- the full-roller configuration has the advantage that, in comparison with a design with a cage, it is possible to arrange a greater number of cylindrical rollers 16 over the same distance, such that the load rating is increased.
- the swashplate-type pivot bearing 17 formed by the cylindrical bearing surface 11 , hollow cylindrical bearing surface 12 and the rolling bearing segment 15 has, in each case, one follow-up device 18 at the free ends of the rolling bearing segment 15 .
- the follow-up devices 18 synchronize the position of the rolling bodies with the position of the bearing surfaces 11 and 12 .
- the follow-up devices 18 are provided, which both move relative to the housing part 3 and the swashplate 10 in the event of an actuation of the lever 14 and which press or slide the cylindrical rollers into the predefined position during the movement.
- FIGS. 2 and 3 show the region around the follow-up devices 18 in a similar view ( FIG. 2 ) and in a schematic plan view ( FIG. 3 ) of the cylindrical bearing surface 11 of the swashplate 10 .
- the follow-up device 18 comprises, as a guide member, a central bolt 19 which is held in a rotatable and—as can be seen in particular from FIG. 3 —slidable fashion in an end stop body 20 .
- a diameter step in the bolt 19 firstly prevents the bolt from being able to slip out of the end stop body 20 and to damage the swashplate-type pivot bearing 17 .
- the diameter step also provides a guide surface between the bolt 19 and bearing surfaces 11 , 12 . Said guide surface ensures that the bolt cannot tilt. The greater the diameter difference is at the diameter step, the larger said guide surface.
- the end stop body 20 has, on the side facing toward the cylindrical rollers 16 , a curved surface which is adapted to the shape of the cylindrical rollers 16 and which is designed for making contact with the cylindrical rollers 16 .
- the curved surface serves to provide intimate contact.
- the guidance of the bolt 19 takes place by means of slots, with a first slot 21 being arranged in the cylindrical bearing surface 11 and a second slot 23 being arranged in the hollow cylindrical bearing surface 12 , that is to say opposite in relation to the bearing gap 22 .
- the first slot 21 is inclined in relation to the extent of the rolling bearing segment by an angle ⁇ in the plan view of FIG. 3 .
- the second slot 23 is also inclined by an equal or similar angle ⁇ , specifically in such a way that, in the plan view shown in FIG. 3 , the two slots 21 , 23 cross at an intersection 25 .
- the intersection 25 at the same time defines a bearing point 26 for the bolt 19 , which is positively guided by the first and second slots 21 , 23 in the manner of a slotted guide.
- the follow-up devices 18 which form the synchronization elements, therefore serve to ensure the correct position of the rolling bearing segment 15 with respect to the housing section 3 and the swashplate 10 or between the swashplate 10 and the housing section 3 , at all times and in all positions of the lever 14 .
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
- 1 Cylinder drum
- 2 Shaft
- 3 Housing section
- 4 Housing part
- 5 Bearing
- 6 Bearing
- 7 Cylinder bores
- 8 Piston
- 9 Sliding shoes
- 10 Swashplate
- 11 Cylindrical bearing surface
- 12 Hollow cylindrical bearing surface
- 13 Axis
- 14 Lever
- 15 Rolling bearing segment
- 16 Cylindrical rollers
- 17 Swashplate-type pivot bearing
- 18 Follow-up device
- 19 Bolt
- 20 End stop body
- 21 First slot
- 22 Bearing gap
- 23 Second slot
- 24 Extent
- 25 Intersection
- 26 Bearing point
- 27 Slotted hole
Claims (12)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009013094.2 | 2009-03-13 | ||
DE102009013094.2A DE102009013094B4 (en) | 2009-03-13 | 2009-03-13 | Swash plate pivot bearing and axial piston machine |
DE102009013094 | 2009-03-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20100278463A1 US20100278463A1 (en) | 2010-11-04 |
US9046084B2 true US9046084B2 (en) | 2015-06-02 |
Family
ID=42557970
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/720,841 Expired - Fee Related US9046084B2 (en) | 2009-03-13 | 2010-03-10 | Swashplate-type pivot bearing and axial piston machine |
Country Status (2)
Country | Link |
---|---|
US (1) | US9046084B2 (en) |
DE (1) | DE102009013094B4 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10302073B2 (en) * | 2016-04-21 | 2019-05-28 | Parker-Hannifin Corporation | Axial hydraulic piston pump |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009013094B4 (en) | 2009-03-13 | 2018-09-13 | Schaeffler Technologies AG & Co. KG | Swash plate pivot bearing and axial piston machine |
US8998489B2 (en) * | 2009-06-09 | 2015-04-07 | Schaeffler Technologies AG & Co. KG | Segment rolling bearing, and axial hydraulic pump having the segment rolling bearing |
US9109446B1 (en) * | 2011-02-07 | 2015-08-18 | Ameriband, Llc | Continuously variable displacement engine |
US9540932B1 (en) * | 2011-02-07 | 2017-01-10 | Ameriband, Llc | Continuously variable displacement engine |
US9896933B1 (en) * | 2011-02-07 | 2018-02-20 | Ameriband, Llc | Continuously variable displacement engine |
US10041405B1 (en) * | 2011-02-07 | 2018-08-07 | Ameriband, Llc | Continuously variable displacement engine |
DE102012202742B3 (en) * | 2012-02-22 | 2013-05-16 | Sauer-Danfoss Gmbh & Co. Ohg | Swash plate swivel bearing for adjusting axial piston machine, has inner and outer guide comprising respective guide tracks, and cage guide comprising guide track that runs perpendicular to regions of guide tracks of inner and outer guides |
CN102705191B (en) * | 2012-06-01 | 2015-09-23 | 沈如华 | The mill base quantitative supply device of colour mixer |
US9581057B1 (en) | 2014-08-20 | 2017-02-28 | Ameriband, Llc | Valve actuator system capable of operating multiple valves with a single cam |
CN109026985A (en) * | 2018-10-22 | 2018-12-18 | 河北富特来轴承科技有限公司 | Crescent moon bearing waves component and hydraulic pump |
DE102019116250B4 (en) * | 2019-06-14 | 2023-02-16 | Schaeffler Technologies AG & Co. KG | Swing cradle bearing and method of manufacturing a swing cradle bearing |
DE102019122435B4 (en) | 2019-08-21 | 2021-09-23 | Schaeffler Technologies AG & Co. KG | Swivel cradle mounting and method for producing a synchronization device for a swiveling cradle mounting |
DE102020106907A1 (en) | 2020-03-13 | 2021-09-16 | Schaeffler Technologies AG & Co. KG | Swivel cradle mounting and method for producing a synchronization device for a swiveling cradle mounting |
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US2605622A (en) * | 1946-05-16 | 1952-08-05 | Borg Warner | Spline joint |
US2977164A (en) | 1959-10-26 | 1961-03-28 | Duerkoppwerke | Roller bearings having roller cages of synthetic material |
US3024073A (en) * | 1959-08-24 | 1962-03-06 | Hammond Machinery Builders Inc | Bearing structure and support for reciprocable member |
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-
2009
- 2009-03-13 DE DE102009013094.2A patent/DE102009013094B4/en not_active Expired - Fee Related
-
2010
- 2010-03-10 US US12/720,841 patent/US9046084B2/en not_active Expired - Fee Related
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---|---|---|---|---|
US1471254A (en) | 1922-12-12 | 1923-10-16 | Forbes Archibald Wallace | Ball or roller bearing |
US2605622A (en) * | 1946-05-16 | 1952-08-05 | Borg Warner | Spline joint |
US3024073A (en) * | 1959-08-24 | 1962-03-06 | Hammond Machinery Builders Inc | Bearing structure and support for reciprocable member |
US2977164A (en) | 1959-10-26 | 1961-03-28 | Duerkoppwerke | Roller bearings having roller cages of synthetic material |
US4449445A (en) * | 1982-06-01 | 1984-05-22 | Abex Corporation | Recirculating roller bearing rocker cam support |
US4558962A (en) | 1983-12-23 | 1985-12-17 | Skf Kugellagerfabriken Gmbh | Snap ring |
US4858480A (en) * | 1984-11-20 | 1989-08-22 | Hydromatic Gmbh | Swash plate swivel bearing for a hydraulic axial piston machine |
US4627330A (en) * | 1984-12-11 | 1986-12-09 | Sundstrand Corporation | Unitary bearing retainer for a swashplate bearing |
US5011305A (en) * | 1987-07-31 | 1991-04-30 | Fag Kugelfischer Georg Schafer (Kgaa) | Cage for a sectorial antifriction bearing |
US4907898A (en) | 1989-01-03 | 1990-03-13 | The Torrington Company | Roller bearing with single flange races |
US5024143A (en) * | 1989-05-16 | 1991-06-18 | Hydromatik Gmbh | Swashplate type hydraulic axial piston machine having a tracking device for the cage of the segmental rolling contact bearing of the swashplate |
US5069560A (en) | 1989-12-04 | 1991-12-03 | Fag Kugelfischer Georg Schafer | Cage for sealing a bearing |
US5390584A (en) * | 1993-10-25 | 1995-02-21 | Caterpillar Inc. | Follow up mechanism for a swashplate bearing |
US5528977A (en) | 1995-02-28 | 1996-06-25 | Caterpillar Inc. | Retention mechanism for a cage of a swashplate bearing |
US5501533A (en) * | 1995-07-03 | 1996-03-26 | Roller Bearing Company Of America | Roller bearing assembly having improved axial retention and angular clocking |
US5630352A (en) | 1996-03-08 | 1997-05-20 | Vickers, Incorporated | Variable displacement hydrualic piston machine saddle bearing |
US5810482A (en) | 1996-08-05 | 1998-09-22 | Aleynik; Isaak | Roller bearing |
US6027250A (en) * | 1998-08-21 | 2000-02-22 | The Torrington Company | Roller bearing segment for swashplates and other limited-oscillation applications |
US6719460B1 (en) | 1999-06-07 | 2004-04-13 | Ina Walzlager Schaeffler Ohg | Swash-plate drag bearing |
US6676294B2 (en) | 2001-03-26 | 2004-01-13 | Ntn Corporation | Rocking bearing |
US7232372B2 (en) * | 2001-10-26 | 2007-06-19 | Ntn Corporation | Tripod constant velocity universal joint |
US7178986B2 (en) | 2002-02-15 | 2007-02-20 | Koyo Seiko Co., Ltd. | Rolling bearing |
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US7597481B2 (en) | 2004-05-26 | 2009-10-06 | Schaeffler Kg | Sealed four-row ball bearing for support and working roller bearing on roller stands |
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US7793582B2 (en) * | 2005-05-20 | 2010-09-14 | Schaeffler Kg | Swash plate pivot bearing |
US20090126561A1 (en) | 2005-05-20 | 2009-05-21 | Schaeffler Kg | Swash plate pivot bearing |
US20090208161A1 (en) | 2006-05-17 | 2009-08-20 | Schaeffler Kg | Cage segment for the cage of a roller bearing |
US8172464B2 (en) | 2006-11-09 | 2012-05-08 | Ntn Corporation | Tapered roller bearing |
US8167503B2 (en) | 2007-06-08 | 2012-05-01 | Ntn Corporation | Taper roller bearing |
US8376615B2 (en) | 2007-12-14 | 2013-02-19 | Schaeffler Technologies AG & Co. KG | Pivot bearing |
US8021235B2 (en) * | 2008-12-16 | 2011-09-20 | Nexteer (Beijing) Technology Co., Ltd. | Rolling element shaft assembly |
US20100278463A1 (en) | 2009-03-13 | 2010-11-04 | Schaeffler Technologies Gmbh & Co., Kg | Swashplate-type pivot bearing and axial piston machine |
US20110007994A1 (en) | 2009-06-09 | 2011-01-13 | Schaeffler Technologies Gmbh & Co. Kg | Segment rolling bearing, and axial hydraulic pump having the segment rolling bearing |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US10302073B2 (en) * | 2016-04-21 | 2019-05-28 | Parker-Hannifin Corporation | Axial hydraulic piston pump |
Also Published As
Publication number | Publication date |
---|---|
DE102009013094B4 (en) | 2018-09-13 |
US20100278463A1 (en) | 2010-11-04 |
DE102009013094A1 (en) | 2010-09-16 |
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